What version are you using? I just tried loading a 64bit wav and it returned an error. Looking at the code there is a specific check in release i’m using that returns an error if the number of bits is not 32.

No it doesnt support it, all i can think if you really wanted this we could internally downscale it to 32bit ieee float?
Otherwise we’d have to introduce a 64bit pipeline which would increase the code size a lot with all of the new mixer/resampler combinations.

Well actually the whole dsp network stuff would have to double in size as well, so to keep things sane it would have to be downscaled to 32bit at some point.